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Terms & Conditions

Last Updated: March 2026

Welcome to Notebook.

Notebook is a study application designed to help Class 9 & 10 students access notes, important questions (IMP), and previous year question papers (PYQP) for educational purposes. By accessing or using this app, you agree to be bound by these Terms & Conditions. If you do not agree, please discontinue use of the app.

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Educational Purpose

This app provides educational support content for study purposes only. We strive to maintain accuracy and syllabus alignment with CBSE guidelines. However, we do not guarantee that all information is error-free or fully complete. Students are advised to verify important information with official NCERT textbooks and board guidelines.

2a.
Class 9 Draft Content Notice

Some Class 9 content — particularly Maths — may be based on draft NCERT 2026–27 materials. Chapter lists may differ slightly from the final printed textbook. We recommend cross-checking with your school-issued book.

2b.
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The app tracks local study data including streaks, chapters saved, exam countdown, and days active. This data is stored on your device only and is not transmitted to our servers. Clearing app/browser data will reset all stats.

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Notebook does not guarantee marks improvement, exam success, or specific academic outcomes. Performance depends entirely on individual preparation, effort, and other external factors. Use of this app is at the student's own discretion.

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Violation of any of these may result in immediate account suspension without refund.

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Users may save notes, Important Questions (IMP), and Previous Year Papers (PYP) inside the app for personal study access. Saved content is for personal educational use only and must not be redistributed, published, or shared outside the app.

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6a.
NCERT / CBSE Disclaimer

Notebook is an independent, student-run educational initiative. It is not affiliated with, endorsed by, or sponsored by NCERT (National Council of Educational Research and Training) or CBSE (Central Board of Secondary Education). "NCERT" and "CBSE" are their respective owners' names and trademarks, used here only to describe the syllabus this content follows. All notes, summaries and questions on Notebook are prepared independently for revision purposes only and are not official NCERT/CBSE publications.

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Notebook is designed for students aged 13 and above. Users under 18 years of age should use this app with awareness of their parent or guardian.

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Privacy Policy

Last Updated: March 2026

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2a.
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Changes to Privacy Policy

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If you have questions about this Privacy Policy, you may contact us at [email protected].

8.
Draft Content Notice

Some Class 9 content in this app may be based on draft NCERT 2026–27 materials. Final chapter lists may vary from printed textbooks.

Operated by Rohit Saini

Grievance Redressal

Last Updated: March 2026

We take user concerns seriously.

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For Parents & Guardians

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Operated by Rohit Saini

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About Notebook
Notebook
Study Smart. Score Better.
Version 1.0.0 · CBSE Class 9 & 10

Built for students, by someone who understands the exam pressure.

Notebook is a free study app for Class 9 and Class 10 CBSE students. It brings together chapter notes, important questions, and previous year papers — all in one clean, simple app that works even on slow internet.

Our goal is simple: help every student study smarter, revise faster, and feel more confident before exams — without needing expensive coaching or heavy study material.

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Class 9th Mathematics Chapter 9 Exploring Algebraic Identities – Notes

Class 9 Maths Chapter 9 – Algebraic identities, factorisation, special products. NCERT CBSE notes.

Topics covered in Exploring Algebraic Identities

Frequently asked questions

What topics are covered in Class 9th Mathematics Chapter 9 Exploring Algebraic Identities notes?

This chapter covers: Standard algebraic identities, Factorisation using identities, Special products.

Are Exploring Algebraic Identities notes free?

Yes, Notebook gives free NCERT CBSE notes for Class 9 Mathematics.

How to prepare Exploring Algebraic Identities for Class 9 Mathematics exams?

Read the Exploring Algebraic Identities notes first, revise the key topics (Standard algebraic identities, Factorisation using identities, Special products), then practise the important questions and previous year questions (PYQ) for this chapter.

Where can I find Class 9th Mathematics Chapter 9 Exploring Algebraic Identities notes for quick revision?

You are on the right page: this notes page for Exploring Algebraic Identities covers Class 9 Mathematics for the CBSE exam 2026-27. Use the tabs on this chapter for notes, important questions and PYQ.

Is Class 9th Mathematics Chapter 9 Exploring Algebraic Identities important for the CBSE exam 2026-27?

Exploring Algebraic Identities is part of the Class 9 Mathematics NCERT CBSE syllabus. Notebook gives notes, important questions and PYQs for it, free.

Also see: Class 9th Mathematics Chapter 9 Exploring Algebraic Identities Important Questions · Class 9th Mathematics Chapter 9 Exploring Algebraic Identities PYQ

Exploring Algebraic Identities

Basic Terms of a Circle

A circle is the locus of all points equidistant from a fixed point (centre). Key terms: radius (r), diameter (d = 2r), chord (line segment joining two points on circle), arc (part of circle), sector (region between two radii), segment (region between chord and arc). Longest chord = diameter.

Theorems on Chords and Angles

Key theorems: (1) Equal chords are equidistant from the centre. (2) The perpendicular from the centre to a chord bisects it. (3) Angle subtended at the centre = twice the angle at any point on the remaining arc. (4) Angles in the same segment are equal. (5) Opposite angles of a cyclic quadrilateral are supplementary.

Cyclic Quadrilaterals

A cyclic quadrilateral has all four vertices on a circle. Theorem: The sum of opposite angles of a cyclic quadrilateral = 180°. Converse: If opposite angles of a quadrilateral are supplementary, it is cyclic. Angles in a semicircle = 90° (angle in a semi-circle is a right angle).

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Other chapters in Mathematics · Class 9
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Coordinate Geometry Class 9 · Mathematics
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Polynomials Class 9 · Mathematics
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Number Systems Class 9 · Mathematics
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Euclid's Geometry Class 9 · Mathematics
05
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Lines and Angles Class 9 · Mathematics
06
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07
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08
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Mensuration (Area) Class 9 · Mathematics
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